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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 21 |
| 5 | 58 |
| 6 | 128 |
| 7 | 276 |
| 8 | 516 |
| 9 | 1169 |
| 10 | 2227 |
| 11 | 4324 |
| 12 | 8335 |
| 13 | 15574 |
| 14 | 29116 |
| 15 | 55048 |
| 16 | 97698 |
| 17 | 176291 |
| 18 | 323277 |
| 19 | 563453 |
| 20 | 1005089 |
| 21 | 1770789 |
| 22 | 3076868 |
| 23 | 5293907 |
| 24 | 9184885 |
| 25 | 15668638 |
| 26 | 26751095 |
| 27 | 45517048 |
| 28 | 76882920 |
| 29 | 128738414 |
| 30 | 217219751 |
| 31 | 360525590 |
| 32 | 599158211 |
| 33 | 995474365 |
[0,1,3,11,21,58,128,276,516,1169,2227,4324,8335, 15574,29116,55048,97698,176291,323277,563453, 1005089,1770789,3076868,5293907,9184885,15668638, 26751095,45517048,76882920,128738414,217219751, 360525590,599158211,995474365] |